Knife edge inspection device, method and printing modification system

Abstract

The present invention provides a blade inspection device, method and printing trimming system, belonging to the technical field of screen printing. The blade inspection device of the present invention comprises a telescopic component, a driving component and a parameter acquisition module, wherein the driving component is used to drive the telescopic component to move in a direction parallel to the straight line where the blade is located; the parameter acquisition module is used to acquire a first parameter so as to inspect the blade according to the first parameter; the first parameter is related to the displacement of the first end of the telescopic component in a direction perpendicular to the straight line where the blade is located. The blade inspection device can quickly inspect the blade defects of the printing scraper.

Description

Technical Field

[0001] The invention belongs to the technical field of screen printing, and in particular relates to a knife edge inspection device, a knife edge inspection method and a printing modification system using the knife edge inspection. Background Art

[0002] Screen printing has a wide range of applications. For example, it can be used in the display panel packaging process. Take the OLED (Organic Light-Emitting Diode) display panel as an example. As a new type of flat panel display, it has attracted more and more attention due to its active light emission, high light brightness, wide viewing angle, fast response speed, low energy consumption and flexibility. It has become the next generation display technology that may replace liquid crystal display.

[0003] The current OLED devices contain organic layer materials that are extremely sensitive to water vapor and oxygen, which greatly reduces the life of the OLED devices. In order to solve this problem, the existing technology mainly uses various materials to isolate the organic layer materials of the OLED from the outside world so that the sealing meets the requirements. A commonly used sealing method is: fill the sealing area of ​​the packaging cover with adhesives such as glass material, align the array substrate and the packaging cover, and then use a laser beam to move and heat the adhesive to melt the adhesive. The melted adhesive forms a closed packaging connection between the packaging cover and the array substrate.

[0004] At present, the formation of adhesive in the packaging area on the packaging cover is usually achieved by thin film screen printing. First, the packaging cover is placed on the base, and the packaging cover and the thin film screen (there is a certain distance between the two) are mechanically aligned; then a printing scraper is used to print the adhesive on the thin film screen onto the packaging cover. During the packaging process, the interaction between the adhesive components (such as glass powder, ceramic powder, metal oxide, etc.) and the printing scraper may cause the printing scraper to wear, or foreign matter on the thin film screen may also cause the printing scraper to wear; in addition, during the cleaning process, some human factors may also cause damage to the printing scraper. These wear or damage are difficult to observe with the human eye. When there are defects in the printing scraper, the grinding flatness cannot be controlled, resulting in uncontrollable printing height and printing morphology, which in turn leads to a decrease in the process yield and does not meet mass production requirements.

[0005] Therefore, it is necessary to study a blade inspection device, method and printing repair system for quickly detecting printing scraper defects, effectively controlling the process yield, so that each batch of finished products will not have different morphology of the printed surface of the adhesive due to printing scraper defects, thereby meeting production needs.

[0006] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of the present invention, and therefore may include information that does not constitute prior art known to ordinary technicians in the field. Summary of the invention

[0007] The object of the present invention is to provide a knife edge inspection device, a knife edge inspection method and a printing modification system using the knife edge inspection, thereby overcoming one or more problems caused by the limitations and defects of the relevant technology at least to a certain extent.

[0008] In order to achieve the above-mentioned invention object, the present invention adopts the following technical scheme:

[0009] According to one aspect of the present invention, there is provided a knife edge inspection device, comprising:

[0010] A telescopic component, wherein a first end of the telescopic component contacts a blade of a printing scraper, a second end of the telescopic component is located in a motion interval parallel to a straight line where the blade is located, and a line connecting the first end and the second end of the telescopic component is perpendicular to the straight line where the blade is located;

[0011] A driving assembly, used for driving the telescopic assembly to move in a direction parallel to the straight line where the blade is located;

[0012] A parameter acquisition module is used to acquire a first parameter so as to inspect the blade according to the first parameter; the first parameter is related to the displacement of the first end of the telescopic component in a direction perpendicular to the straight line where the blade is located.

[0013] In an exemplary embodiment of the present disclosure, the telescopic assembly includes a spring assembly, a first end of the spring assembly is in contact with the blade of the printing scraper, a second end is located in a movement interval parallel to a straight line where the blade is located, and the spring assembly is in a stretched state;

[0014] The parameter acquisition module includes a tension measurement component connected to the second end of the spring component to obtain the tension value of the spring component as the first parameter.

[0015] In an exemplary embodiment of the present disclosure, the telescopic assembly further includes:

[0016] The spring fixing component is sleeved on the periphery of the spring component to ensure that the spring component is perpendicular to the straight line where the knife edge is located when moving in a direction parallel to the straight line where the knife edge is located.

[0017] In an exemplary embodiment of the present disclosure, the telescopic assembly includes an extension member, a first end of the extension member contacts the blade of the printing scraper, a second end of the extension member is located in a motion interval parallel to a straight line where the blade is located, and the extension member is a rigid body;

[0018] The parameter acquisition module includes a displacement sensor for acquiring the displacement of the second end of the extension piece in a direction perpendicular to the straight line where the blade is located as the first parameter.

[0019] In an exemplary embodiment of the present disclosure, the telescopic assembly further includes:

[0020] A driving unit is connected to the second end of the extension member to drive the extension member to move in a direction perpendicular to the straight line where the blade is located, so that the first end of the extension member maintains contact with the blade of the printing scraper.

[0021] In an exemplary embodiment of the present disclosure, the displacement sensor comprises:

[0022] a displacement conversion unit, used to generate an electrical signal related to the displacement of the second end of the extension member in a direction perpendicular to the straight line where the blade is located;

[0023] A signal amplifying unit, used for amplifying the electrical signal;

[0024] The analog-to-digital conversion unit is used to convert the amplified electrical signal into a digital signal, and calculate the displacement of the second end of the extension piece in a direction perpendicular to the straight line where the blade is located according to the digital signal.

[0025] In an exemplary embodiment of the present disclosure, it further includes:

[0026] A calculation unit, used for calculating the difference between the first parameter and a preset parameter;

[0027] The alarm unit is used to issue an alarm prompt when the difference is greater than a preset threshold.

[0028] In an exemplary embodiment of the present disclosure, the alarm unit includes providing the alarm prompt by means of sound and / or light.

[0029] According to one aspect of the present disclosure, a knife-edge inspection method is provided, which is applied to the knife-edge inspection device according to any one of the above items, comprising:

[0030] Driving the telescopic assembly to move in a direction parallel to the straight line where the blade is located;

[0031] The first parameter is obtained, and the blade is inspected according to the first parameter; the first parameter is related to the displacement of the first end of the telescopic component in a direction perpendicular to the straight line where the blade is located.

[0032] According to one aspect of the present disclosure, there is provided a printing trimming system, comprising a printing scraper and a blade inspection device according to any one of the above items.

[0033] The present invention provides a knife edge inspection device, a knife edge inspection method and a printing and trimming system using the knife edge inspection. The knife edge inspection device provided by the present invention includes a telescopic component, a driving component and a parameter acquisition module. The driving component is used to drive the telescopic component to move in a direction parallel to the straight line where the knife edge is located. The parameter acquisition module is used to obtain the displacement of the first end of the driving component in a direction perpendicular to the straight line where the knife edge is located. The displacement value can be used to quickly check whether the printing scraper has defects, thereby overcoming the shortcomings of slow speed and difficulty in distinguishing the depth of the notch when observing the defects of the printing scraper blade with the human eye, thereby effectively controlling the process so that each batch of products produced will not have a different morphology of the printed surface of the adhesive due to defects in the printing scraper, thereby meeting production needs.

[0034] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] The accompanying drawings herein are incorporated into and constitute a part of the specification, illustrate embodiments consistent with the present invention, and together with the specification are used to explain the principles of the present invention. Obviously, the accompanying drawings described below are only some embodiments of the present invention, and for those of ordinary skill in the art, other accompanying drawings can be obtained based on these accompanying drawings without creative work.

[0036] Figure 1 A schematic structural diagram of a knife edge inspection device in an exemplary embodiment of the present invention is shown.

[0037] Figure 2 A schematic structural diagram showing that the telescopic assembly in an exemplary embodiment of the present invention is a spring assembly.

[0038] Figure 3 A graph showing the variation of the tension on the spring assembly with the displacement in an exemplary embodiment of the present invention.

[0039] Figure 4 A schematic structural diagram of another telescopic assembly in an exemplary embodiment of the present invention is shown.

[0040] Figure 5 A schematic diagram showing a module of a sensor in an exemplary embodiment of the present invention.

[0041] Figure 6 A schematic structural diagram of a printing scraper device with an alarm in an exemplary embodiment of the present invention is shown.

[0042] Figure 7 A flow chart of a knife-edge inspection method in an exemplary embodiment of the present invention is shown.

[0043] The figures are marked as follows: 1- telescopic component; 2- movement range; 3- driving component; 4- parameter acquisition module; 5- calculation unit; 6- alarm unit; 101- spring component; 102- spring fixing component; 401- tension measurement component; 111- extension piece; 112- driving unit; 411- displacement sensor; 4111- displacement conversion unit; 4112- signal amplification unit; 4113- analog-to-digital conversion unit. DETAILED DESCRIPTION

[0044] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in a variety of forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that the present invention will be more comprehensive and complete and will fully convey the concepts of the example embodiments to those skilled in the art. The same reference numerals in the figures represent the same or similar structures, and thus their detailed description will be omitted.

[0045] Although relative terms such as "upper" and "lower" are used in this specification to describe the relative relationship of one component of the illustration to another component, these terms are used in this specification only for convenience, such as the orientation of the examples described in the drawings. It is understood that if the device of the illustration is turned upside down, the component described as "upper" will become the component "lower". Other relative terms, such as "high", "low", "top", "bottom", "left", "right", etc., also have similar meanings. When a structure is "on" other structures, it may mean that the structure is formed integrally on the other structure, or that the structure is "directly" disposed on the other structure, or that the structure is "indirectly" disposed on the other structure through another structure.

[0046] The terms "a", "an", and "said" are used to indicate the presence of one or more elements / components / etc.; the terms "comprising" and "having" are used to indicate an open-ended inclusive meaning and mean that additional elements / components / etc. may be present in addition to the listed elements / components / etc.

[0047] Figure 1 A schematic structural diagram of a knife edge inspection device in an exemplary embodiment of the present invention is shown; Figure 2 A schematic diagram showing a structure in which the telescopic assembly in an exemplary embodiment of the present invention is a spring assembly; Figure 3 A graph showing the variation of the tension on the spring assembly with the displacement in an exemplary embodiment of the present invention; Figure 4 A schematic structural diagram showing another telescopic assembly in an exemplary embodiment of the present invention; Figure 5 A schematic diagram showing a module of a sensor in an exemplary embodiment of the present invention; Figure 6 A schematic diagram showing the structure of a printing scraper device with an alarm in an exemplary embodiment of the present invention; Figure 7A flow chart of a knife-edge inspection method in an exemplary embodiment of the present invention is shown.

[0048] This exemplary embodiment provides a schematic diagram of the structure of a knife edge inspection device. Figure 1 As shown, the knife edge inspection device may include a telescopic component 1, a motion interval 2 parallel to the straight line where the knife edge is located, a driving component 3 and a parameter acquisition module 4; the first end of the telescopic component 1 is in contact with the knife edge, the second end is located in the motion interval 2 parallel to the straight line where the knife edge is located, and the line connecting the first end and the second end of the telescopic component 1 is perpendicular to the straight line where the knife edge is located; the driving component 3 drives the telescopic component 1 to move in a direction parallel to the straight line where the knife edge is located; the parameter acquisition module 4 is used to obtain a first parameter.

[0049] The blade inspection device provided in this example embodiment includes a telescopic component, a driving component and a parameter acquisition module. The driving component is used to drive the telescopic component to move in a direction parallel to the straight line where the blade is located. The parameter acquisition module is used to obtain the displacement of the first end of the driving component in a direction perpendicular to the straight line where the blade is located. The displacement value can be used to quickly check whether the printing scraper has defects, thereby overcoming the shortcomings of the human eye when observing the defects of the printing scraper blade, such as slow speed and difficulty in distinguishing the depth of the notch, and thus effectively controlling the process so that each batch of products produced will not have different morphologies of the printed surface of the adhesive due to defects in the printing scraper, thereby meeting production needs.

[0050] For example, the blade inspection device can be applied to the printing scraper of the glass foot encapsulated OLED device. For example, the printing scraper can be detachably mounted on the printing machine beam. The printing machine beam can be a rectangular structure with a groove or a clip at the lower end to fix the printing scraper and realize the disassembly function of the printing scraper. Of course, the structure of the printing machine beam can also be other structures, such as a hollow handheld structure with a groove, two spliced ​​splints, etc.; that is, as long as the structure can fix the printing scraper and facilitate the disassembly of the printing scraper, it is within the protection scope of the present disclosure and is not limited here.

[0051] A parallel rod parallel to the straight line where the printing scraper blade is located can be fixedly installed on the crossbeam of the printing machine. The parallel rod can be used as the motion range 2. The second end of the telescopic component 1 can be fixed on the parallel rod by means of magnetic attraction, sleeve connection, clamping connection, hooking, etc., and can move along the parallel rod. That is, the connection method between the second end of the telescopic component and the parallel rod can be a variety of conventional methods, as long as it can be moved along the parallel rod and fixed on the parallel rod, which is not limited here. The first end of the telescopic component 1 can contact the blade of the printing scraper by means of a hook, etc. Of course, it can also contact the blade of the printing scraper by other means, such as a magnetic method, etc., as long as it does not affect the movement of the first end of the telescopic component along the blade.

[0052] The driving assembly can be installed on the printing machine, and is used to drive the telescopic assembly to move in a direction parallel to the straight line where the blade is located, and the driving method can be electric drive or mechanical drive. In order to ensure that the line connecting the first end and the second end of the driving assembly is always perpendicular to the straight line where the blade is located when moving along the blade, multiple driving blocks can be installed on the parallel rods and the back of the printing scraper, and the electric drive is used to make the movement speed of the multiple driving blocks the same, so as to ensure that the line connecting the first end and the second end of the telescopic assembly is always perpendicular to the straight line where the blade is located when moving along the blade.

[0053] The telescopic component 1 can be an elastic component, such as a spring component; it can also be a rigid component with an extension and can move in a direction perpendicular to the straight line where the blade is located, such as a steel pipe sleeved with a steel rod.

[0054] Take the telescopic component as an elastic component as an example, Figure 2 As shown, the telescopic component 1 includes a spring component 101, a first end of the spring component 101 is in contact with the blade of the printing scraper, and a second end is located in a movement range parallel to the straight line where the blade is located, and the spring component 101 is perpendicular to the straight line where the blade is located; the parameter acquisition module 4 includes a tension measurement component 401, which is located at the second end of the spring component 101 and is used to measure the tension exerted on the first end of the spring component 101; the telescopic component 1 also includes a spring fixing component 102, which is used to keep the spring component 101 perpendicular to the straight line where the blade is located during lateral movement without deflection.

[0055] For example, the spring assembly can be a spring. The first end of the spring can be hooked and hooked on the blade of the printing scraper. The second end can be a ring and sleeved on the parallel rods. The spring is always in a stretched state. A tension meter is installed at the second end of the spring. The tension meter is used to measure the tension exerted on the first end of the spring. The tension meter can display the tension value. A fixed assembly perpendicular to the straight line where the blade is located can be installed on the telescopic assembly. The fixed assembly is made of a rigid material, such as a steel cover, etc., and is used to fix the spring to always be perpendicular to the straight line where the blade is located when it moves along the blade. When the spring moves in a direction parallel to the straight line where the blade of the printing scraper is located under the drive of the driving assembly, a curve of the change of tension over time can be drawn by computer value acquisition, and the curve can be used to determine whether the blade of the printing scraper has defects and whether it needs to be replaced. Figure 3 The figure shows the curve of the pulling force changing with time when there is a defect on the blade of the printing scraper.

[0056] Take the telescopic component as a rigid extension as an example, Figure 4 As shown, the telescopic component 1 may also include an extension piece 111, a first end of the extension piece contacts the blade of the printing scraper, and a second end is located in a movement range parallel to the straight line where the blade is located, and the extension piece 111 is a rigid body, and the parameter acquisition module includes a displacement sensor 411, which is used to obtain the displacement of the first end of the extension piece 111 in a direction perpendicular to the straight line where the blade is located.

[0057] Furthermore, the telescopic assembly 1 also includes a driving unit 112, which is connected to the second end of the extension assembly 111 to drive the extension member 111 to move in a direction perpendicular to the straight line where the blade is located, so that the first end of the extension member 111 maintains contact with the blade of the printing scraper.

[0058] For example, the extension piece is a rigid rod, such as a metal rod, the first end of the metal rod is in contact with the printing scraper blade through a metal hook, and the metal rod can be magnetic, which is used to adsorb the metal rod on the printing scraper so that the metal rod and the printing scraper fit well. The drive unit can be connected to the second end of the metal rod by a sleeve connection, and the metal rod moves in a direction perpendicular to the straight line where the blade is located. The drive unit can be fixed to the horizontal rod by magnetic attraction or clamping. When the drive unit and the metal rod move in a direction parallel to the straight line where the blade is located at the same time, the displacement sensor obtains the displacement of the first end of the metal rod in a direction perpendicular to the straight line where the blade is located.

[0059] Furthermore, if Figure 5 As shown, the displacement sensor 411 includes a displacement conversion unit 4111, a signal amplifying unit 4112 and an analog-to-digital conversion unit 4113; the displacement conversion unit 4111 is used to generate an electrical signal related to the displacement of the first end of the extension piece in a direction perpendicular to the straight line where the blade is located; the signal amplifying unit 4112 is used to amplify the electrical signal; the analog-to-digital conversion unit 4113 is used to convert the amplified electrical signal into a digital signal, and calculate the displacement of the first end of the extension piece in a direction perpendicular to the straight line where the blade is located based on the digital signal.

[0060] For example, the displacement sensor may include a displacement conversion unit, a signal amplification unit and an analog-to-digital conversion unit. When the driving component drives the metal rod to move in a direction parallel to the straight line where the blade is located, first, the displacement conversion unit generates an electrical signal related to the displacement of the first end of the metal rod in a direction perpendicular to the straight line where the blade is located; then, the signal amplification unit amplifies the electrical signal; finally, the analog-to-digital conversion unit converts the amplified electrical signal into a digital signal, and calculates the displacement of the first end of the metal rod in a direction perpendicular to the straight line where the blade is located based on the digital signal.

[0061] The parameter acquisition module 4 can directly or indirectly acquire the displacement of the first end of the telescopic component in the direction perpendicular to the straight line where the blade is located. For example, the indirect acquisition method can be, when the deformation is elastic deformation, the displacement value is converted into a tension value by a spring tension meter, and the location of the blade defect is found by the change of the tension value. For example, the direct acquisition method can be, when the deformation is the displacement of the relative movement of the two components, the displacement value is directly measured, and further, the displacement value can be converted into a digital signal by connecting a displacement sensor, and the displacement of the first end of the telescopic component in the direction perpendicular to the straight line where the blade is located is calculated according to the digital signal.

[0062] Furthermore, the knife edge inspection device may also include a calculation unit 5 and an alarm unit 6; the calculation unit 5 is used to calculate the difference between the displacement value or tension value and the preset displacement value or tension value; when the difference is greater than the displacement threshold or tension threshold, the alarm unit 6 sends an alarm signal.

[0063] For example, Figure 6 As shown, the alarm device is arranged on the crossbeam of the printing press, and the telescopic component is a spring component as an example. When the difference calculated by the calculation unit is greater than the tension threshold, the difference is the absolute value of the tension value received by the first end of the spring and the tension value preset in the calculation unit, and the alarm unit sends an alarm signal, which can be a sound signal, a light signal, or a combination of the two. The specific alarm method is not limited here. The tension value preset in the calculation unit can be the tension value received by the first end of the spring when the blade of the same batch of printing scrapers is intact.

[0064] This exemplary embodiment provides a flowchart of a knife edge inspection method. Figure 7 As shown, the knife edge inspection method may include the following steps:

[0065] S101: driving the telescopic assembly to move in a direction parallel to the straight line where the blade is located;

[0066] S102: Acquire the first parameter, and inspect the blade according to the first parameter; the first parameter is related to the displacement of the first end of the telescopic component in a direction perpendicular to the straight line where the blade is located.

[0067] Step S101, the telescopic component moves in a direction parallel to the straight line where the blade is located under the drive of the driving component, such as the spring component or the rigid extension member moves in a direction parallel to the straight line where the blade is located under the electric drive or mechanical drive of the driving component.

[0068] Step S102, obtaining the displacement of the first end of the telescopic assembly in a direction perpendicular to the straight line where the blade is located by a direct or indirect method, so as to determine whether the blade is worn.

[0069] Taking the telescopic component as a spring as an example, the spring moves in a direction parallel to the straight line where the blade is located under the drive of the drive component. The drive can be an electric drive, such as a drive button. When the drive button is pressed, the spring starts to move in a direction parallel to the straight line where the blade is located; the drive can also be a mechanical drive, such as a dragging device to drag the spring in a direction parallel to the straight line where the blade is located. The spring dynamometer measures the tension value of the first end of the spring in a direction perpendicular to the straight line where the blade is located, and determines whether the blade has defects by the change in the tension value.

[0070] Taking the telescopic component as a rigid extension as an example, the rigid extension moves in a direction parallel to the straight line where the blade is located under the drive of the driving component, and moves in a direction perpendicular to the straight line where the blade is located under the drive of the driving unit. The vertical displacement of the first end of the rigid extension is measured by a displacement measuring instrument to determine whether the blade has a defect. Furthermore, the displacement of the first end of the rigid extension in a direction perpendicular to the straight line where the blade is located is converted into an electrical signal through a displacement sensor, the electrical signal is amplified, the amplified electrical signal is converted into a digital signal, and the displacement of the first end of the rigid extension in a direction perpendicular to the straight line where the blade is located is calculated based on the digital signal, thereby determining whether the blade has a defect.

[0071] In addition, the blade inspection device mentioned in the above exemplary embodiment is suitable for detecting the blade edge of the printing scraper in all printing and trimming processes.

[0072] The verticality mentioned in the above exemplary embodiments is not verticality in a geometric sense. The verticality in the printing process may have a certain range of deviation from the right angle. The right angle and the range of right angle deviation are both within the protection scope of the present disclosure.

[0073] It should be understood that the present invention is not limited in its application to the detailed structure and arrangement of the components proposed in this specification. The present invention can have other embodiments and can be implemented and executed in a variety of ways. The aforementioned variations and modifications fall within the scope of the present invention. It should be understood that the present invention disclosed and defined in this specification extends to all alternative combinations of two or more individual features mentioned or evident in the text and / or the drawings. All these different combinations constitute multiple alternative aspects of the present invention. The embodiments described in this specification illustrate the best mode known for implementing the present invention and will enable those skilled in the art to utilize the present invention.

Claims

1. A printing modification system, characterized in that: include: Printing scraper and blade inspection device; The printing scraper is a printing scraper for encapsulating OLED devices with glass glue, and the printing scraper is detachably fixed on the crossbeam of the printing machine; The knife edge inspection device comprises: A telescopic component, wherein a first end of the telescopic component has a hook, and the hook is hooked on the blade of the printing scraper, and a second end is located in a movement range parallel to a straight line where the blade is located, and a line connecting the first end and the second end of the telescopic component is perpendicular to the straight line where the blade is located; The movement range is a parallel rod parallel to the straight line where the printing scraper blade is located, and the parallel rod is fixed on the printing machine beam, and the second end of the telescopic assembly is fixed on the parallel rod and can move along the parallel rod; A driving assembly, comprising a plurality of driving blocks fixed on the parallel rods and the printing scraper, wherein the plurality of driving blocks are used to drive the telescopic assembly to move on the parallel rods and ensure that the line connecting the first end and the second end of the telescopic assembly is always perpendicular to the straight line where the blade is located when moving; A parameter acquisition module is used to acquire a first parameter so as to inspect the blade according to the first parameter; the first parameter is related to the displacement of the first end of the telescopic component in a direction perpendicular to the straight line where the blade is located.

2. The printing correction system according to claim 1, characterized in that: The telescopic assembly includes a spring assembly, a first end of the spring assembly is in contact with the blade of the printing scraper, a second end of the spring assembly is located in a motion range parallel to the straight line where the blade is located, and the spring assembly is in a stretched state; The parameter acquisition module includes a tension measurement component connected to the second end of the spring component to obtain the tension value of the spring component as the first parameter.

3. The printing modification system according to claim 2, characterized in that: The telescopic assembly also includes: The spring fixing component is sleeved on the periphery of the spring component to ensure that the spring component is perpendicular to the straight line where the knife edge is located when moving in a direction parallel to the straight line where the knife edge is located.

4. The printing modification system according to claim 1, characterized in that: The telescopic assembly comprises an extension piece, a first end of the extension piece contacts the blade of the printing scraper, a second end of the extension piece is located in a motion interval parallel to the straight line where the blade is located, and the extension piece is a rigid body; The parameter acquisition module includes a displacement sensor for acquiring the displacement of the second end of the extension piece in a direction perpendicular to the straight line where the blade is located as the first parameter.

5. The printing correction system according to claim 4, characterized in that: The telescopic assembly also includes: A driving unit is connected to the second end of the extension member to drive the extension member to move in a direction perpendicular to the straight line where the blade is located, so that the first end of the extension member maintains contact with the blade of the printing scraper.

6. The printing modification system according to claim 4, characterized in that: The displacement sensor comprises: a displacement conversion unit, used to generate an electrical signal related to the displacement of the second end of the extension member in a direction perpendicular to the straight line where the blade is located; A signal amplifying unit, used for amplifying the electrical signal; The analog-to-digital conversion unit is used to convert the amplified electrical signal into a digital signal, and calculate the displacement of the second end of the extension piece in a direction perpendicular to the straight line where the blade is located according to the digital signal.

7. The printing and trimming system according to any one of claims 1 to 6, characterized in that: Also includes: A calculation unit, used for calculating the difference between the first parameter and a preset parameter; The alarm unit is used to issue an alarm prompt when the difference is greater than a preset threshold.

8. The printing modification system according to claim 7, characterized in that: The alarm unit includes providing the alarm prompt in the form of sound and / or light.

9. A knife edge inspection method, applied to the printing modification system according to any one of claims 1 to 8; characterized in that: include: Driving the telescopic assembly to move in a direction parallel to the straight line where the blade is located; The first parameter is obtained, and the blade is inspected according to the first parameter; the first parameter is related to the displacement of the first end of the telescopic component in a direction perpendicular to the straight line where the blade is located.

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